I have a book size pc with exactly the same processor
and a DOC socket and a CF socket and two IDE busses.
I decided to go the easy way, opened up the case, installed
a 2.5" disk drive and hooked up an ATAPI CDROM player to
the intestines of the thing just for installing Gentoo.
Afterwards, I removed the CDROM player and closed the
thing up. I'm writing this message on it.

Great! A fanless machine in my living room.
It's not fast, but it's quiet and it doesn't burn a lot of electricity.

It would be kEWL with Linux on a CF-memorycard - but I was wondering how to install Gentoo on that, since I only have 256MB and 512MB memorycards in stock.

I'm planning to do the same kind of thing. I'm going to do the install on a different machine (lots of memory and spare disk for swap...). I've got a few CF -> IDE adapters, so I can just treat it as an ordinary disk, but failing that you could bootstrap using a USB card reader...

Probably easiest to install to a local partition as well, and then cp everything across.

I think this can be done, all you need to do is stick a regular IDE drive in the thing to bootstrap the system (for temp space), after you're done and it works you format the CompactFlash card as ext2 (or whatever, I suggest ReiserFS as it will reduce disk space requirements) mount it at '/cf' and copy every folder on '/' (except '/cf') to '/cf'. reboot witht he gentoo cd, chroot into the cf image and run /sbin/lilo to get the bootloader in. This is oversimplified, but if you can handle a stage1 install and you get the gist of what I'm syaing you'll be fine.

I suggest exporting the portage tree from a read-only NFS share on another machine, as it will use way too much space on your CF card. Remember to 'rm -rf /usr/portage/*' before you NFS mount the portage tree remotely or you'll still be wasting disk space._________________-Marc Doughty
-Microsoft Certified Professional
-Macintosh Specialist
-SAMBA Daemon
-mdoughty@etal.uri.edu